:root {
  --apple-blue: #0071e3;
  --apple-blue-hover: #0077ED;
  --bg-color: #f5f5f7;
  --card-bg: rgba(255, 255, 255, 0.7);
  --text-main: #1d1d1f;
  --text-secondary: #86868b;
  --border-color: #d2d2d7;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  background-image: radial-gradient(circle at top right, #e2e2e5, transparent 40%),
                    radial-gradient(circle at bottom left, #e8e8ed, transparent 40%);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 18px;
  padding: 40px 30px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.4);
  text-align: center;
}

.logo-area {
  margin-bottom: 16px;
}

.logo-icon {
  width: 48px;
  height: 48px;
  color: var(--apple-blue);
}

h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.login-portrait {
  width: 118px;
  aspect-ratio: 1170 / 1573;
  margin: 0 auto 24px;
  overflow: hidden;
  border: 4px solid rgba(255, 255, 255, 0.94);
  border-radius: 24px;
  background: #eef2f6;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.16), 0 0 0 1px rgba(15, 23, 42, 0.07);
}

.login-portrait img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.input-group {
  position: relative;
  margin-bottom: 16px;
  text-align: left;
}

.input-group input {
  width: 100%;
  padding: 16px 16px 8px;
  font-size: 16px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background-color: rgba(255, 255, 255, 0.8);
  color: var(--text-main);
  outline: none;
  transition: all 0.2s ease;
}

.input-group input:focus {
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
  background-color: #fff;
}

.input-group label {
  position: absolute;
  left: 16px;
  top: 14px;
  color: var(--text-secondary);
  font-size: 16px;
  transition: all 0.2s ease;
  pointer-events: none;
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
  top: 6px;
  font-size: 11px;
  color: var(--apple-blue);
}
.input-group input:not(:placeholder-shown):not(:focus) + label {
  color: var(--text-secondary);
}

.login-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 2px 2px 14px;
}

.login-check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #4b5563;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

.login-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--apple-blue);
  cursor: pointer;
}

.login-check input:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.login-check:has(input:disabled) {
  color: #9ca3af;
  cursor: not-allowed;
}

.login-btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background-color: var(--apple-blue);
  color: white;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  margin-top: 8px;
  transition: background-color 0.2s ease;
}

.login-btn:hover {
  background-color: var(--apple-blue-hover);
}

.login-btn:disabled {
  background-color: #8dbfff;
  cursor: not-allowed;
}

.error-msg {
  color: #ff3b30;
  font-size: 13px;
  margin-top: -8px;
  margin-bottom: 12px;
  display: none;
  text-align: left;
  padding-left: 4px;
}

.account-hint {
  margin-top: 32px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.6;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 640px) {
  .login-portrait {
    width: 104px;
    margin-bottom: 20px;
    border-radius: 20px;
  }
}